] Trans. Acad. Sci. of St. Louis. 
the several objects, an interesting half hour was spent 
in the inspection of this exhibit, which included the man- 
uscript and original sketches for Engelmann’s thesis as. 
well as the publication itself in a copy with partly colored 
plates; several volumes of his many thousands of unpub- 
lished notes and sketches; the simple dissecting micros- 
cope and the elaborate compound microscope made by 
Hachet; the Jubilee Medal struck by the Academy in 
1906, bearing Engelmann’s portrait; an illustration of 
the Colorado Engelmannia spruce; and specimens and 
original descriptions of the three genera of plants that 
have been dedicated to his memory in the name of Engel- 
mannia. 
The following were elected to membership: J. W. 
Blankinship, Ben Blewett, C. H. Danforth, Victor E. Em- 
mel, Henry V. Farr, Robert H. Fuhrmann, W. W. Ohl- 
weiler, George M. Reed, Robert S. Schlueter, Charles H. 
Thompson, Meyer Wiener. 
Frpruary 15, 1909. 
President Trelease in the chair; attendance 75. 
The following program had been arranged, to com- 
memorate the centenary of the birth of Charles Darwin 
(February 12, 1809.) : 
_ Darwin as a Naturalist...... Professor S. M. Coulter 
Darwin’s Influence Upon Geology............. 
AB Ma PRG AR PoE Professor W. E. McCourt 
The Natural Selection Theory and Its Latter 
Dury (orities: 6523s as Professor J. F. Abbott 
Some Aspects of Darwin’s Influence Upon Mod- 
ern Thought: |. .4 555.72 Professor A. O. Lovejoy 
At the conclusion of the special meeting, Professor 
Nipher presented to the Academy some changes in the 
manner of his experiments, and some of the additional 
results that he has obtained in his studies of momentum 
effects in electric discharges. 
The following were elected to membership: George 
L. Allen, F. W. Brockman, Murray Carleton, Peyton T. 
Carr, Daniel Catlin, Harley P. Chandler, Enos Clarke, 
